My favorite Bach recording has to be Glenn Gould's The Art of Fugue (but it is perhaps not as accessible).
The Mass in B minor is also incredible (don't have a specific recording to point to there).
e.g.
Bach: Concerto for violin in A minor http://www.youtube.com/watch?v=Rmlsxr_ceSc
Vivaldi: Concerto for 2 violoncellos, strings & b.c. in G minor http://www.youtube.com/watch?v=3gQCUACBxTo
My favorite Bach recording has to be Glenn Gould's The Art of Fugue (but it is perhaps not as accessible).
The Mass in B minor is also incredible (don't have a specific recording to point to there).